// Internal optimization: we know kclient will eventually lookup "ns/name"
	// We also have a key in this format.
	// Rather than split and rejoin it later, just pass it as the name
	// This is depending on "unstable" implementation details, but we own both libraries and tests would catch any issues.
	if got := i.inf.Get(string(k), ""); !controllers.IsNil(got) {
		return &got
	}
	return nil
}

	"istio.io/istio/pkg/test/framework/components/cluster/kube"
	"istio.io/istio/pkg/test/framework/config"
	"istio.io/istio/pkg/test/framework/resource"
	"istio.io/istio/pkg/test/scopes"
)

// Environment is the implementation of a kubernetes environment. It implements environment.Environment,
// and also hosts publicly accessible methods that are specific to cluster environment.
type Environment struct {
	id       resource.ID

type Rule struct {
	chain  string
	table  string
	params []string
}

// Rules represents iptables for V4 and V6
type Rules struct {
	rulesv4 []*Rule
	rulesv6 []*Rule
}

// IptablesRuleBuilder is an implementation for IptablesRuleBuilder interface
type IptablesRuleBuilder struct {
	rules Rules
	cfg   *config.Config
}

// NewIptablesBuilders creates a new IptablesRuleBuilder

package cluster

import (
	"bytes"
	"fmt"

	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/test/framework/config"
)

// Map can be given as a shared reference to multiple Topology/Cluster implementations.
// allowing clusters to find each other for lookups of Primary, ConfigCluster, etc.
type Map = map[string]Cluster

func NewTopology(config Config, allClusters Map) Topology {
	return Topology{